BUFFER_SIZE = 8192

TIMEOUT_RECV = 2        # 接收数据超时
TIMEOUT_SHUTDOWN = 5    # 最大等待超时
HEART_BEAT_PERIOD = 2   # 心跳间隔时长
HEART_LISTEN_PERIOD = 1 # 心跳检测时长

BROKER_PORT = 31610
BROKER_HOST = "103.72.167.230"